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Article #3286Re: Can I extend past 3 meters with SCSI
From: Craig Dewick
Date: Sat, 16 Nov 1996 00:00
Date: Sat, 16 Nov 1996 00:00
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1895 bytes
In <slrn58p0g5.5kj.wonko@madness.tmok.com> wonko@madness.tmok.com () writes:
>as far as putting 7 drives on a narrow SCSI-II (no wide, just fast) bus, the
>3 feet limit is a recomendation. you can run longer than 3 feet. SCSI-II
>Narrow is a little more forgiving of doing things like exceeding length or
>not putting terminators at one end (yes, it does work fr two or three drives
>anyway) Wide SCSI is much less forgiving of fudging things.
I'm sure you are referring to cable lengths in metres instead of feet.. 8-)
A simple way to ensure that your long SCSI chain will function properly is
to use active termination. This way the terminators continuously and
automatically adapt themselves to suit the electrical conditions. I've had
trouble with long SCSI chains up to 6 metres or so which were fixed once I
replaced the passive terminators with active ones.
Of course, this is not a fix for all long-cable problems, but it goes a long
way to overcoming most difficulties.
Regards,
Craig.
--
Craig Dewick. Send email to 'cdewick@lios.apana.org.au'
Point a web browser at 'http://lios.apana.org.au/~cdewick/sun_ark.html' to
access my collection of Sun information and links to other places.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f4671,70e7411b5d4d5789 X-Google-Attributes: gidf4671,public X-Google-Thread: 10d053,7d7fdff7017c8fd6,start X-Google-Attributes: gid10d053,public From: cdewick@lios.apana.org.au (Craig Dewick) Subject: Re: Can I extend past 3 meters with SCSI Date: 1996/11/16 Message-ID: <56k2iv$7s@lios.apana.org.au> X-Deja-AN: 201487118 references: <56794h$6jo@csu-b.csuohio.edu> <56dihh$538@whitney.cs.unc.edu> <56h4b7$ec4@camel4.mindspring.com> <slrn58p0g5.5kj.wonko@madness.tmok.com> organization: Lios - Children of the Light newsgroups: comp.sys.sun.hardware,aus.computers.sun